摘要
The electrochemical reduction of carbon dioxide can convert the greenhouse gas into value-added chemical products or fuels, which provides a promising strategy to address current energy and environmental issues. Increasing the selectivity for C2&C2+ products, particularly ethylene, remains an important goal in this field. We chose cuprous chloride as the catalyst precursor for electrochemical reduction of CO_2, which efficiently converted carbon dioxide to ethylene. CuCl powder exhibited a maximum ethylene faradaic efficiency (FE) of 37%,ethylene partial current density of 14.8 mA/cm^2, and selectivity of 57.5% for C2&C2+ products at-1.06 V (vs. reversible hydrogen electrode, RHE). Electron microcopy (TEM, SEM) and time-resolved ex situ X-ray diffraction (XRD) demonstrated that the catalyst was transformed gradually into a mixed phase of copper and cuprous oxide, with the morphological change into a cubic structure during reduction process. The presence of Cu^(1+) and the unique electrode morphology may simultaneously lead to the enhanced electrochemical activity.
The electrochemical reduction of carbon dioxide can convert the greenhouse gas into value-added chemical products or fuels, which provides a promising strategy to address current energy and environmental issues. Increasing the selectivity for C2&C2+ products, particularly ethylene, remains an important goal in this field. We chose cuprous chloride as the catalyst precursor for electrochemical reduction of CO_2, which efficiently converted carbon dioxide to ethylene. CuCl powder exhibited a maximum ethylene faradaic efficiency (FE) of 37%,ethylene partial current density of 14.8 mA/cm^2, and selectivity of 57.5% for C2&C2+ products at-1.06 V (vs. reversible hydrogen electrode, RHE). Electron microcopy (TEM, SEM) and time-resolved ex situ X-ray diffraction (XRD) demonstrated that the catalyst was transformed gradually into a mixed phase of copper and cuprous oxide, with the morphological change into a cubic structure during reduction process. The presence of Cu^(1+) and the unique electrode morphology may simultaneously lead to the enhanced electrochemical activity.
基金
financially supported by Shell-CAS Frontier Sciences Program (No. PT48809) from Shell and start-up funding from Shanghai Tech University
作者简介
Corresponding author:Bo-Lin Lin,E-mail address:linbl@shanghaitech.edu.cn(B.-L.Lin).
